No HPA enabled drive, Press any key to boot

This is a discussion on No HPA enabled drive, Press any key to boot within the Windows XP Support forums, part of the Tech Support Forum category. Today when i tried to turn on my computer it wouldnt load. It stopped on the started screen and at

Today when i tried to turn on my computer it wouldnt load. It stopped on the started screen and at the bottom it said 'No HPA enabled drive, Press any key to boot'. After doing that it then says 'boot disk failure insert system disk and press enter'. I put in my 'Windows XP professional' disk ,pressed enter and nothing happened. Could you please help me, im also not a computer pro. so step by step, detailed instructions would be nice